package com.zkingsoft.rhi.utils;

import com.zkingsoft.rhi.entity.StateOwnedUnits;
import com.zkingsoft.rhi.excel.ExcelColumn;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.lang.BooleanUtils;
import org.apache.commons.lang.CharUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.math.NumberUtils;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.http.MediaType;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.math.BigDecimal;
import java.net.URLEncoder;
import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.*;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
import java.util.stream.Stream;

@Slf4j
public class ExcelUtils {

    private final static String EXCEL2003 = "xls";
    private final static String EXCEL2007 = "xlsx";
    public static Integer number=null;
    public static String name=null;
    public static String address=null;



    public static <T> List<T> readExcel(String readExcel,Class<T> cls, MultipartFile file){



        String fileName = file.getOriginalFilename();
        if (!fileName.matches("^.+\\.(?i)(xls)$") && !fileName.matches("^.+\\.(?i)(xlsx)$")) {
            log.error("上传文件格式不正确");
        }
        List<T> dataList = new ArrayList<>();
        Workbook workbook = null;
        try {
            InputStream is = file.getInputStream();
            if (fileName.endsWith(EXCEL2007)) {
                workbook = new XSSFWorkbook(is);
            }
            if (fileName.endsWith(EXCEL2003)) {
                workbook = new HSSFWorkbook(is);
            }
            if (workbook != null) {
                //类映射  注解 value-->bean columns
                Map<String, List<Field>> classMap = new HashMap<>();
//                获取实体类中的字段
                List<Field> fields = Stream.of(cls.getDeclaredFields()).collect(Collectors.toList());
                fields.forEach(
                        field -> {
                            ExcelColumn annotation = field.getAnnotation(ExcelColumn.class);
                            if (annotation != null) {
                                String value = annotation.value();
                                if (StringUtils.isBlank(value)) {
                                    return;//return起到的作用和continue是相同的 语法
                                }
                                if (!classMap.containsKey(value)) {
                                    classMap.put(value, new ArrayList<>());
                                }
                                field.setAccessible(true);
                                classMap.get(value).add(field);
                            }
                        }
                );

                //索引-->columns
                Map<Integer, List<Field>> reflectionMap = new HashMap<>(16);
                //默认读取第一个sheet
                Sheet sheet = workbook.getSheetAt(0);

                boolean firstRow = true;

                int index=0;

                if (readExcel.equals("readMovableExcel")){
                    String str =  sheet.getRow(1).getCell(2).toString();
                    name = sheet.getRow(2).getCell(2).toString();
                    address = sheet.getRow(3).getCell(2).toString();
                    number =Double.valueOf(str).intValue();//转换为Int类型
                    index=4;
                }

                for (int i = sheet.getFirstRowNum()+index; i <= sheet.getLastRowNum(); i++) {
                    Row row = sheet.getRow(i);
                    //首行  提取注解
                    if (firstRow) {
                        for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
                            Cell cell = row.getCell(j);
                            String cellValue = getCellValue(cell);
                            //去掉换行符
                            Pattern p = Pattern.compile("\\s*|\t|\r|\n");
                            Matcher m = p.matcher(cellValue);
                            cellValue = m.replaceAll("");
//                            System.out.println("cellValue===================>"+cellValue);
                            if (classMap.containsKey(cellValue)) {
                                reflectionMap.put(j, classMap.get(cellValue));
                            }
                        }
                        firstRow = false;
                    } else {
                        //忽略空白行
                        if (row == null) {
                            continue;
                        }
                        try {
                            T t = cls.newInstance();
                            //判断是否为空白行
                            boolean allBlank = true;
                            for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
                                if (reflectionMap.containsKey(j)) {
                                    Cell cell = row.getCell(j);
                                    String cellValue = getCellValue(cell);
                                    if (StringUtils.isNotBlank(cellValue)) {
                                        allBlank = false;
                                    }
                                    List<Field> fieldList = reflectionMap.get(j);
                                    fieldList.forEach(
                                            x -> {
                                                try {
                                                    handleField(t, cellValue, x);
                                                } catch (Exception e) {
                                                    log.error(String.format("reflect field:%s value:%s exception!", x.getName(), cellValue), e);
                                                }
                                            }
                                    );
                                }
                            }
                            if (!allBlank) {
                                dataList.add(t);
                            } else {
                                log.warn(String.format("row:%s is blank ignore!", i));
                            }
                        } catch (Exception e) {
                            log.error(String.format("parse row:%s exception!", i), e);
                        }
                    }
                }

//                System.out.println("classMap============================>"+classMap.toString());
            }
        } catch (Exception e) {
            log.error(String.format("parse excel exception!"), e);
        } finally {
            if (workbook != null) {
                try {
                    workbook.close();
                } catch (Exception e) {
                    log.error(String.format("parse excel exception!"), e);
                }
            }
        }

        return dataList;
    }

    private static <T> void handleField(T t, String value, Field field) throws Exception {
        Class<?> type = field.getType();
        if (type == null || type == void.class || StringUtils.isBlank(value)) {
            return;
        }
        if (type == Object.class) {
            field.set(t, value);
            //数字类型
        } else if (type.getSuperclass() == null || type.getSuperclass() == Number.class) {
            if (type == int.class || type == Integer.class) {
                field.set(t, NumberUtils.toInt(value));
            } else if (type == long.class || type == Long.class) {
                field.set(t, NumberUtils.toLong(value));
            } else if (type == byte.class || type == Byte.class) {
                field.set(t, NumberUtils.toByte(value));
            } else if (type == short.class || type == Short.class) {
                field.set(t, NumberUtils.toShort(value));
            } else if (type == double.class || type == Double.class) {
                field.set(t, NumberUtils.toDouble(value));
            } else if (type == float.class || type == Float.class) {
                field.set(t, NumberUtils.toFloat(value));
            } else if (type == char.class || type == Character.class) {
                field.set(t, CharUtils.toChar(value));
            } else if (type == boolean.class) {
                field.set(t, BooleanUtils.toBoolean(value));
            } else if (type == BigDecimal.class) {
                field.set(t, new BigDecimal(value));
            }
        } else if (type == Boolean.class) {
            field.set(t, BooleanUtils.toBoolean(value));
        } else if (type == Date.class) {
            SimpleDateFormat df = new SimpleDateFormat("yyyy.MM.dd");
            Date dt = df.parse(value);
            field.set(t, dt);
        } else if (type == String.class) {
            field.set(t, value);
        } else if (type == LocalDate.class) {
            //String 转 LocalDate
            DateTimeFormatter df = DateTimeFormatter.ofPattern("yyyy.MM.dd");
            LocalDate dt = LocalDate.parse(value, df);
            field.set(t, dt);
        } else {
            Constructor<?> constructor = type.getConstructor(String.class);
            field.set(t, constructor.newInstance(value));
        }
    }

    private static String getCellValue(Cell cell) {
        if (cell == null) {
            return "";
        }
        if (cell.getCellType() == Cell.CELL_TYPE_NUMERIC) {
            if (HSSFDateUtil.isCellDateFormatted(cell)) {
                return HSSFDateUtil.getJavaDate(cell.getNumericCellValue()).toString();
            } else {
                return new BigDecimal(cell.getNumericCellValue()).toString();
            }
        } else if (cell.getCellType() == Cell.CELL_TYPE_STRING) {
            return StringUtils.trimToEmpty(cell.getStringCellValue());
        } else if (cell.getCellType() == Cell.CELL_TYPE_FORMULA) {
            return StringUtils.trimToEmpty(cell.getCellFormula());
        } else if (cell.getCellType() == Cell.CELL_TYPE_BLANK) {
            return "";
        } else if (cell.getCellType() == Cell.CELL_TYPE_BOOLEAN) {
            return String.valueOf(cell.getBooleanCellValue());
        } else if (cell.getCellType() == Cell.CELL_TYPE_ERROR) {
            return "ERROR";
        } else {
            return cell.toString().trim();
        }

    }

    public static <T> void writeExcelGroup(HttpServletRequest request, HttpServletResponse response, Map<String, List<T>> dataList, Class<T> cls){
        Field[] fields = cls.getDeclaredFields();
        List<Field> fieldList = Arrays.stream(fields)
                .filter(field -> {
                    ExcelColumn annotation = field.getAnnotation(ExcelColumn.class);
                    if (annotation != null && annotation.col() > 0) {
                        field.setAccessible(true);
                        return true;
                    }
                    return false;
                }).sorted(Comparator.comparing(field -> {
                    int col = 0;
                    ExcelColumn annotation = field.getAnnotation(ExcelColumn.class);
                    if (annotation != null) {
                        col = annotation.col();
                    }
                    return col;
                })).collect(Collectors.toList());

        Workbook wb = new XSSFWorkbook();


        dataList.forEach((mapKey,mapValue)->{
            Sheet sheet = wb.createSheet(mapKey);

            AtomicInteger ai = new AtomicInteger();
            {
                Row row = sheet.createRow(ai.getAndIncrement());
                AtomicInteger aj = new AtomicInteger();

                //写入头部
                fieldList.forEach(field -> {
                    ExcelColumn annotation = field.getAnnotation(ExcelColumn.class);
                    String columnName = "";
                    if (annotation != null) {
                        columnName = annotation.value();
                    }
                    Cell cell = row.createCell(aj.getAndIncrement());

                    CellStyle cellStyle = wb.createCellStyle();
                    cellStyle.setFillForegroundColor(IndexedColors.WHITE.getIndex());
                    cellStyle.setFillPattern(CellStyle.SOLID_FOREGROUND);
                    cellStyle.setAlignment(CellStyle.ALIGN_CENTER);

                    Font font = wb.createFont();
                    font.setBoldweight(Font.BOLDWEIGHT_NORMAL);
                    cellStyle.setFont(font);
                    cell.setCellStyle(cellStyle);
                    cell.setCellValue(columnName);
                });
            }



            if (CollectionUtils.isNotEmpty(mapValue)) {
                mapValue.forEach(t -> {
                    Row row1 = sheet.createRow(ai.getAndIncrement());
                    AtomicInteger aj = new AtomicInteger();
                    fieldList.forEach(field -> {
                        Class<?> type = field.getType();
                        Object value = "";
                        try {
                            value = field.get(t);
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                        Cell cell = row1.createCell(aj.getAndIncrement());
                        if (value != null) {
                            if (type == Date.class) {
                                cell.setCellValue(value.toString());
                            } else if (type == LocalDate.class){
                                DateTimeFormatter df = DateTimeFormatter.ofPattern("yyyy.MM.dd");
                                cell.setCellValue(df.format((LocalDate) value));
                            } else {
                                cell.setCellValue(value.toString());
                            }
                        }
                    });
                });
            }
        });

        String token = request.getParameter("token");
        //冻结窗格
//        wb.getSheet().createFreezePane(0, 1, 0, 1);
        //浏览器下载excel
        buildExcelDocument(request.getParameter("fileName"),wb,token,response);
        //生成excel文件
//        buildExcelFile(".\\default.xlsx",wb);
    }


    public static <T> void writeExcel(HttpServletRequest request, HttpServletResponse response, List<T> dataList, Class<T> cls,String export,StateOwnedUnits sou){
        Field[] fields = cls.getDeclaredFields();
        List<Field> fieldList = Arrays.stream(fields)
                .filter(field -> {
                    ExcelColumn annotation = field.getAnnotation(ExcelColumn.class);
                    if (annotation != null && annotation.col() > 0) {
                        field.setAccessible(true);
                        return true;
                    }
                    return false;
                }).sorted(Comparator.comparing(field -> {
                    int col = 0;
                    ExcelColumn annotation = field.getAnnotation(ExcelColumn.class);
                    if (annotation != null) {
                        col = annotation.col();
                    }
                    return col;
                })).collect(Collectors.toList());

        Workbook wb = new XSSFWorkbook();
        Sheet sheet = wb.createSheet("Sheet1");

        int count =0;

        if (export.equals("exportMovableExcel")){
            System.out.println("================exportMovableExcel==============");
            Integer number = sou.getNumber();
            String name = sou.getName();
            String address = sou.getAddress();
            System.out.println("number==================>"+number);
            System.out.println("name==================>"+name);
            System.out.println("address==================>"+address);
            Row row = sheet.createRow(0);
            row.createCell(0).setCellValue("编号");
            row.createCell(1).setCellValue(number);
            Row row1 = sheet.createRow(1);
            row1.createCell(0).setCellValue("国有单位名称");
            row1.createCell(1).setCellValue(name);
            Row row2 = sheet.createRow(2);
            row2.createCell(0).setCellValue("国有单位地址");
            row2.createCell(1).setCellValue(address);
            count=3;

        }


        AtomicInteger ai = new AtomicInteger();
        {
            Row row = sheet.createRow(ai.getAndIncrement()+count);
            AtomicInteger aj = new AtomicInteger();

            //写入头部
            fieldList.forEach(field -> {
                ExcelColumn annotation = field.getAnnotation(ExcelColumn.class);
                String columnName = "";
                if (annotation != null) {
                    columnName = annotation.value();
                }
                Cell cell = row.createCell(aj.getAndIncrement());

                CellStyle cellStyle = wb.createCellStyle();
                cellStyle.setFillForegroundColor(IndexedColors.WHITE.getIndex());
                cellStyle.setFillPattern(CellStyle.SOLID_FOREGROUND);
                cellStyle.setAlignment(CellStyle.ALIGN_CENTER);

                Font font = wb.createFont();
                font.setBoldweight(Font.BOLDWEIGHT_NORMAL);
                cellStyle.setFont(font);
                cell.setCellStyle(cellStyle);
                cell.setCellValue(columnName);
            });
        }

        if (0==count){
            if (CollectionUtils.isNotEmpty(dataList)) {
                dataList.forEach(t -> {
                    Row row1 = sheet.createRow(ai.getAndIncrement());
                    AtomicInteger aj = new AtomicInteger();
                    fieldList.forEach(field -> {
                        Class<?> type = field.getType();
                        Object value = "";
                        try {
                            value = field.get(t);
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                        Cell cell = row1.createCell(aj.getAndIncrement());
                        if (value != null) {
                            if (type == Date.class) {
                                cell.setCellValue(value.toString());
                            } else if (type == LocalDate.class){
                                DateTimeFormatter df = DateTimeFormatter.ofPattern("yyyy.MM.dd");
                                cell.setCellValue(df.format((LocalDate) value));
                            } else {
                                cell.setCellValue(value.toString());
                            }
                        }
                    });
                });
            }
        }

        if (3==count){
            if (CollectionUtils.isNotEmpty(dataList)) {
                dataList.forEach(t -> {
                    Row row1 = sheet.createRow(ai.getAndIncrement()+3);
                    AtomicInteger aj = new AtomicInteger();
                    fieldList.forEach(field -> {
                        Class<?> type = field.getType();
                        Object value = "";
                        try {
                            value = field.get(t);
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                        Cell cell = row1.createCell(aj.getAndIncrement());
                        if (value != null) {
                            if (type == Date.class) {
                                cell.setCellValue(value.toString());
                            } else if (type == LocalDate.class){
                                DateTimeFormatter df = DateTimeFormatter.ofPattern("yyyy.MM.dd");
                                cell.setCellValue(df.format((LocalDate) value));
                            } else {
                                cell.setCellValue(value.toString());
                            }
                        }
                    });
                });
            }
        }



        String token = request.getParameter("token");
        //冻结窗格
        wb.getSheet("Sheet1").createFreezePane(0, 1, 0, 1);
        //浏览器下载excel
        buildExcelDocument(request.getParameter("fileName"),wb,token,response);
        //生成excel文件
//        buildExcelFile(".\\default.xlsx",wb);
    }

    /**
     * 浏览器下载excel
     * @param fileName
     * @param wb
     * @param response
     */
    private static  void  buildExcelDocument(String fileName, Workbook wb,String token, HttpServletResponse response){
        try {
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            response.setHeader("token",token);
//            System.out.println("token=============================>"+token);
//            System.out.println("fileName==========================>"+fileName);
            response.setHeader("Content-Disposition", "attachment;filename="+URLEncoder.encode(fileName, "utf-8"));
            response.flushBuffer();
            ServletOutputStream outputStream = response.getOutputStream();
            wb.write(outputStream);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * 生成excel文件
     * @param path 生成excel路径
     * @param wb
     */
    private static  void  buildExcelFile(String path, Workbook wb){

        File file = new File(path);
        if (file.exists()) {
            file.delete();
        }
        try {
            wb.write(new FileOutputStream(file));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
